CAT

B.Tech students have advantage of strong quantitative aptitude, so they are good with numbers. Despite of choosing other courses, if your quant is strong, one can score better and hold good positions.

People get even 100 percentile in CAT exam with regular college studies. It completely depends on your dedication, hard work and the amount of distraction in your life.

3 to 4 months are good enough to prepare for CAT exam, if you spend 6 to 8 hours daily in preparation. But, to be honest more than preparation hours, it is about the study material and your understanding.

You try and appear for other competitive exams during the year. With this percentile, it's difficult to get admission in any institute.

The criteria for CAT is 60 percentile. Try applying with your XAT/MAT scores.

The eligibility criteria for OBC students is 85 percentile overall with no sectional cut-offs.

It is a very good score, though you won't get calls from top 5 IIMs. You can still get calls from other IIMs, you can wait for them or you can apply for colleges like BITS - Pilani, SP Jain, etc.

Yes, from this year onward sectional cut-off scores will be considered before shortlisting for WAT/PI process.
An 80 percentile in all three sections and an aggregate of 90 percentile will be required by a general candidate to receive WAT/PI call.
To know more about the shortlisting criteria for other categories, please visit this link -
http://www.som.iitb.ac.in/joomla/index.php?option=com_content&task=view&id=450&Itemid=60

With that score, you won't get call from any IIMs. So, you can apply for colleges like:
1. AIMS.
2. BITS – Pilani.
3. TAPMI.
4. SP Jain.

With this percentile, you have a very thin chance of getting calls from IIMs. So, you can apply for other reputed colleges like:
1. BITS – Pilani.
2. SP Jain.
3. Welingkar.
4. TAPMI.